Gozaru is meaning last word it's kind of "thouth" in English.
Especially Ninja using the gozaru but it doesn't have deep meaning.

And manybe you know that Japanese "がんばれ”
”がんばれ” is meaning "Good luck" or " You can do it ".
But がんばれ♡ がんばれ♡ is came from Ero manga by Life ITO.
so that phrase is kind of "Hi,honey"(horny) or in Japanese.
well that's it

https://www.animenewsnetwork.com/encyclopedia/lexicon.php?id=36